Problem enabling siding generator addon
I have had this exact problem with other addons, namely the add mesh rocks, and cg cookies' poly strips. 

The problem comes from the name of the directory you created in the addon folder. For your case the folder needs to be named exactly add_mesh_siding_utils. If you rename the folder the addon will work.
This is why, blender is trying to import everything from the addon (this line in the error message.) 
from add_mesh_siding_utils import *

Blender is looking for a directory called add_mesh_siding_utils; the directory name is the module name.